/**
 * jQuery : Encodes and decodes data with MIME base64
 *
 * Manual :
 * 		This method used for encoding string to base64 and decoding theme and fully supported UTF-8 encoding.
 * 		WARNING : For great supporting in UTF-8 encoding in your page you must put
 * 			<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
 * 		in your head of html tag.
 *
 * Recommend :
 * 		I'm Iranian programmer. I do not like that the Google code prevent us to access for download jquery in my county ip.
 * 		Please forget the Google code and use Source Forge for coding hosting.
 * 		Thank and good luck. :)
 *
 * Example :
 * 		<script language="javascript" type="text/javascript">
 *			var mystring = "do me as base64 string\nand new line";
 *			alert(mystring);
 *			alert("base64 of 'mystring' is : " + $.base64_encode(mystring));
 *		</script>
 *
 * @alias base64
 * @version 1.0
 * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
 * @author Muhammad Hussein Fattahizadeh <muhammad [AT] semnanweb [DOT] com>
 *
 * @param {jQuery} {base64_utf8decode:function(input))
 * @param {jQuery} {base64_utf8encode:function(input))
 * @param {jQuery} {base64_encode:function(input))
 * @param {jQuery} {base64_decode:function(input))
 */
(function($){
    var base64_keystring = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    $.extend({
        base64_utf8decode: function(input) {
            var string = "";
            var i = 0;
            var c = c1 = c2 = 0;
            while ( i < input.length ) {
                c = input.charCodeAt(i);
                if (c < 128) {
                    string += String.fromCharCode(c);
                    i++;
                } else if ((c > 191) && (c < 224)) {
                    c2 = input.charCodeAt(i+1);
                    string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                    i += 2;
                } else {
                    c2 = input.charCodeAt(i+1);
                    c3 = input.charCodeAt(i+2);
                    string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                    i += 3;
                }
            }
            return string;
        },
        base64_utf8encode: function(input) {
            input = input.replace(/\r\n/g,"\n");
            var output = "";
            for (var n = 0; n < input.length; n++) {
                var c = input.charCodeAt(n);
                if (c < 128) {
                    output += String.fromCharCode(c);
                } else if ((c > 127) && (c < 2048)) {
                    output += String.fromCharCode((c >> 6) | 192);
                    output += String.fromCharCode((c & 63) | 128);
                } else {
                    output += String.fromCharCode((c >> 12) | 224);
                    output += String.fromCharCode(((c >> 6) & 63) | 128);
                    output += String.fromCharCode((c & 63) | 128);
                }
            }
            return output;
        },
        base64_encode: function(input) {
            var output = "";
            var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
            var i = 0;
            input = this.base64_utf8encode(input);
            while (i < input.length) {
                chr1 = input.charCodeAt(i++);
                chr2 = input.charCodeAt(i++);
                chr3 = input.charCodeAt(i++);
                enc1 = chr1 >> 2;
                enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
                enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
                enc4 = chr3 & 63;
                if (isNaN(chr2)) {
                    enc3 = enc4 = 64;
                } else if (isNaN(chr3)) {
                    enc4 = 64;
                }
                output = output + base64_keystring.charAt(enc1) + base64_keystring.charAt(enc2) + base64_keystring.charAt(enc3) + base64_keystring.charAt(enc4);
            }
            return output;
        },
        base64_decode: function(input) {
            var output = "";
            var chr1, chr2, chr3;
            var enc1, enc2, enc3, enc4;
            var i = 0;
            input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
            while (i < input.length) {
                enc1 = base64_keystring.indexOf(input.charAt(i++));
                enc2 = base64_keystring.indexOf(input.charAt(i++));
                enc3 = base64_keystring.indexOf(input.charAt(i++));
                enc4 = base64_keystring.indexOf(input.charAt(i++));
                chr1 = (enc1 << 2) | (enc2 >> 4);
                chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
                chr3 = ((enc3 & 3) << 6) | enc4;
                output = output + String.fromCharCode(chr1);
                if (enc3 != 64) {
                    output = output + String.fromCharCode(chr2);
                }
                if (enc4 != 64) {
                    output = output + String.fromCharCode(chr3);
                }
            }
            output = this.base64_utf8decode(output);
            return output;
        }
    });
})(jQuery);